Pink and Perry perform at gay gala

The former 4 Non Blondes singer-turned-songwriter helped organise An Evening With Women: Celebrating Art, Music & Equality, an event which raises money for the L.A. Gay and Lesbian Center.

Perry, who wrote the pop star's hit Get The Party Started, entertained the diners with a rousing rendition of her own popular song with her pal, before Pink helped auction off a scooter to raise cash for the good cause.

The winning bid for the Vespa came in at £8,000, and the lucky winner was allowed to pose for a photograph on the bike with Pink while she smoked a cigarette.

The evening also saw Heart rockers Ann and Nancy Wilson reteam for a four-song set, including their international hit Barracuda, while stars including Renee Zellweger and Sarah Silverman attended the gala.